# aFe Power 42-90004 DFS780 Fuel System Sight Glass for Universal Fitment

### Performance Overview

Afe Power's DFS780 Fuel System Parts are designed to keep your fuel system running smoothly. Featuring a clear, high-impact polycarbonate sight glass and helical bronze spur gears, the DFS780 are the perfect solution. The "marine grade" motor is protected from dust intrusion and powerful water jets. aFe Power's DFS780 Fuel System Parts is a plug and play kit that allows you to install an upgraded fuel system on your vehicle without any cutting or modifications. The kit includes a harness that attaches directly to the battery and utilizes Deutsch weather-proof connectors. The DFS780 Fuel System Parts can run independently or parallel with the stock fuel pump powered by ignition. This Fuel System Parts are designed to reduce noise and wear and improve flow through the manifold. These DFS780 Fuel System Parts will help relieve pressure drop due to flow restrictions. The bracket mounts to the frame and utilizes existing holes for secure mounting. It also has a 1/8 inch NPT port that allows customers to attach an external pressure gauge to monitor fuel pressure levels. The DFS780 parts are compatible with both diesel and biodiesel fuels.

### Key Features

-   Brand: aFe Power
-   Part number: 42-90004
-   Product type: DFS780 Fuel System Sight Glass
-   Designed for the compatible vehicle applications listed on this page

### Vehicle Fitment

-   All All All

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase.

**What part number is this?**  
The listed part number is 42-90004.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   DFS780 Fuel System Sight Glass for universal fitment
-   42-90004 fitment
-   aFe Power DFS780 Fuel System Sight Glass
-   universal aFe Power DFS780 Fuel System Sight Glass

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

All

All

All

## Details

- **Price:** 62.81 CAD
- **Vendor:** aFe Power
- **Type:** DFS780 Fuel System Sight Glass
- **Tags:** 42-90004, aFe Power, AFE-42-90004, Air Filter, Air Intake, All All All, Auto Parts, Automotive, DFS780 Fuel System Sight Glass, Diesel Performance, Direct Replacement, Exhaust Performance, Performance Parts, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 62.81 CAD | In stock |

## Images

- aFe Power 42-90004 DFS780 Fuel System Sight Glass

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> Source: [Standard Auto Part](www.standardautopart.com/products/afe-dfs780-fuel-system-universal-42-90004)
> Updated: 2026-06-13